A promising cathode for proton-conducting intermediate temperature solid oxide fuel cells: Y0.8Ca0.2BaCo4O7+δ

Qun Shao, Wujie Ge, Xiaoyong Lu, Yonghong Chen, Yanzhi Ding, Lin Bin, Yihan Ling*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Y0.8Ca0.2BaCo4O7+δ (YCBC4) was synthesized and investigated as a cathode for proton-conducting intermediate temperature solid oxide fuel cells (IT-SOFCs). Low thermal expansion coefficient (TEC) (~9.9×10-6 K-1) can provide good thermal expansion compatibility with the standard SOFC electrolyte materials. Laboratory-sized quad-layer cells, consisting of NiO-BaZr0.1Ce0.7Y0.2O3-δ (BZCY)/NiO-BZCY/BZCY/YCBC4, were fabricated by a one-step dry-pressing/co-firing process and tested from 550 to 700 °C with humidified hydrogen (~3% H2O) as the fuel and static air as the oxidant, respectively. An excellent power density of 472 mW cm-2 and a low electrode polarization resistance of 0.121 Ω cm2 were obtained at 700 °C. Preliminary results demonstrated that the YCBC4 can be a promising cathode material for proton-conducting IT-SOFCs.

Original languageEnglish (US)
Pages (from-to)6687-6692
Number of pages6
JournalCeramics International
Volume41
Issue number5
DOIs
StatePublished - Jun 1 2015

Keywords

  • Intermediate temperature solid oxide fuel cells
  • Low thermal expansion coefficient
  • One-step dry-pressing/co-firing process
  • Polarization resistance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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